Korean Air is offering a 30,000 mile bonus after the first purchase when you sign up for their US Bank Skypass Visa (application here). The normal offer is 15,000 miles. It’s worth viewing that link for the awesome Photoshop job on that page alone…
There’s also a business version of the card, also offering the same 30,000 miles after first purchase.
Personal version is $80 while the business version is $75.
Remember that you can also transfer miles into Korean Air from your Ultimate Rewards account, so this offer may make sense even if 60k miles won’t get you all of that 80,000 mile one-way First Class ticket between the US and Korea. Fuel surcharges on that flight are around ~$125 each way.
The card has no foreign transaction fee, and it comes with 2 lounge passes.